Malicious PDF — malware analysis report

Static analysis result for SHA-256 32442f7ca15dd5ee…

MALICIOUS

PDF

82.4 KB Created: 2021-09-17 03:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3cf9f18bac453dbf6e1ae9381d5bd803 SHA-1: a0cb43669610c2cdf072a38999401ce1bf01a4aa SHA-256: 32442f7ca15dd5ee6755bb168aa4e67bbe230087e2f0c876a0a08c3ef0c55193
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for malicious PDFs to execute code. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs, which are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=file+ppsspp+naruto PDF link annotation
    • http://www.hussco-steel.com/husscofiles/files/kusegefilogolonetajigure.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/87635328731.pdfIn PDF document text
    • http://lukinserv.hu/file/2176012603.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/5120880367.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/52770998331.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/febatutesupopizowa.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/jewim.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/suwina.pdfIn PDF document text
    • https://menu2uplus.com/images/file/26222101565.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/30798769286.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/9339754095.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/18271795850.pdfIn PDF document text
    • http://labotinnghia.com/img/files/78206403495.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/faf94374b8ea30631e035a72e1f47630/41025076041.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/luwabuvunasa.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/lixelilanuvijufozubixosig.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/jafepuv.pdfIn PDF document text
    • https://nevisnews.com/userfiles/75967738770.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/davupapufozemelunep.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/50677523993.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613091e637ad7---rovodilurujinexomixeg.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/43039745536.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/ludijen.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD822 10324 bytes
SHA-256: 5ad59b2daa2effd7fb2dd3bf40dd0434cef2bb7f663cbaba7f841348cc6ae958
font_01_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 20100 bytes
SHA-256: e1cdacefcf258638aae92118870a2be8bfa1ec14a303d8d0caf8c5efd181687b

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